I'm in Tokyo. I'm from Tokyo

I knew Torino in Italy. I'm not exactly sure what you mean, the word knew indicates the past, similiar to しらない This would mean that you knew Torino before, but you now forgot it...

the following but in the next sentence though indicates that you wanted to say don't know,

so the correct sentence would be: I don't know Torino in Italy...

...but I have been to Roma, Italy. 

I dont know soccer in detail,Torino is the famous city that "Juventus" and "Torino Football Club",right? I don't know soccer in detail. Torino is the city with the famous football clubs "Torino Football Club" and "Juventus Turin", right?  

I hope I could be of help to you. If you have any questions, please ask